Matches in SemOpenAlex for { <https://semopenalex.org/work/W2330913654> ?p ?o ?g. }
Showing items 1 to 73 of
73
with 100 items per page.
- W2330913654 endingPage "3369" @default.
- W2330913654 startingPage "3362" @default.
- W2330913654 abstract "PDF HTML阅读 XML下载 导出引用 引用提醒 狗牙根与牛鞭草在三峡库区消落带水淹结束后的抗氧化酶活力 DOI: 10.5846/stxb201203140342 作者: 作者单位: 中国科学院植物研究所植被与环境变化国家重点实验室，中国科学院大学,中国科学院植物研究所植被与环境变化国家重点实验室,湖北神农架国家级自然保护区管理局，湖北神农架 442400,中国科学院植物研究所植被与环境变化国家重点实验室,中国科学院植物研究所植被与环境变化国家重点实验室 作者简介: 通讯作者: 中图分类号: 基金项目: 中国科学院西部行动计划项目(KZCX2-XB2-07);中国科学院方向性项目(KSCX2-EW-J-1) Dynamics of antioxidant enzyme activities in roots of Cynodon dactylon and Hemarthria altissima recovering from annual flooding Author: Affiliation: State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Science, Graduate University of Chinese Academy of Science,,,,State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Science, Beijing 100093, China Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:三峡水库周期性水淹结束后,消落带植物积极恢复生长的能力有利于其生存和定居,因此,探究影响植物恢复生长的关键生理生态机制对于消落带生态治理具有重要意义。采用野外采样、对比测定的手段,研究了生长于三峡水库消落带的狗牙根和牛鞭草根系在冬季水淹结束后清除活性氧(ROS)的关键酶活力恢复动态。结果表明:与对照相比,经历水淹的植物恢复初期发生明显氧化胁迫,超氧化歧化酶(SOD)、抗坏血酸过氧化物酶(APX)均维持了水淹诱导增加的活力水平。两个物种的过氧化氢酶(CAT)在水淹中活力均较低;出露之后后狗牙根CAT趋向于对照水平,牛鞭草CAT活力迅速上升但未到显著水平。水淹结束后24 d各个酶活力均回复到对照水平,表明氧化胁迫已基本消失。消落带位点植物不同酶活力之间表现出显著的相关关系,这可能是植株维持ROS代谢内稳态的表现。 Abstract:A riparian zone with its water level fluctuating annually between 145m and 175m above sea level (ASL) has been created around the impoundment since the Three Gorges Dam was built,, turning the terrestrial ecosystem into wetland with winter flooding every year, and most of the original plant species has diminished due to the dramatic environmental changes. Therefore, it is important to examine the recovery dynamic and ecophysiological mechanisms involved in post-submerged plants for vegetative restoration in this reservoir fluctuation zone (RFZ) of the Three Gorges Reservoir, as the recovery ability is critical for plants to survive the periodic flooding and to inhabit the RFZ.In a field experiment, we examined the activity dynamics of antioxidant enzymes in Cynodon dactylon and Hemarthria altissima after a 6-month long flooding over winter. Superoxide dismutase (SOD), ascorbate peroxidase (APX) and catalase (CAT) were analyzed in root tissue of both species grown in the sites of 158m (re-aeration from flooding) and 175m (never flooded) ASL in the RFZ. Samples were taken every 8 days from the day before exposure (0 day) to the 24th day after drainage.At the beginning of post-flooding period, SOD and APX of both species maintained their high activity induced by flooding, indicating that severe oxidative stress occurred after re-aeration. In contrast, CAT activities were at low level at the end of flooding and increased to the control level rapidly after re-aeration. Oxidative stress was relieved on 24th day after re-aeration, showing that there was no significant difference in enzyme activity between the sites of 158m and 175m ASL.Our results suggest that the capacity for scavenging reactive oxygen species accumulated after re-aeration could be taken as one of the key factors underlying the recovery ability for the RFZ plants. Furthermore, re-aerated plants showed close associations among antioxidant enzyme activity, which might be due to the attempt to maintain redox homeostasis in plant cell. 参考文献 相似文献 引证文献" @default.
- W2330913654 created "2016-06-24" @default.
- W2330913654 creator A5010080080 @default.
- W2330913654 creator A5051385435 @default.
- W2330913654 creator A5055264351 @default.
- W2330913654 creator A5059945797 @default.
- W2330913654 creator A5086048471 @default.
- W2330913654 date "2013-01-01" @default.
- W2330913654 modified "2023-10-02" @default.
- W2330913654 title "Dynamics of antioxidant enzyme activities in roots ofCynodon dactylonandHemarthria altissimarecovering from annual flooding" @default.
- W2330913654 doi "https://doi.org/10.5846/stxb201203140342" @default.
- W2330913654 hasPublicationYear "2013" @default.
- W2330913654 type Work @default.
- W2330913654 sameAs 2330913654 @default.
- W2330913654 citedByCount "1" @default.
- W2330913654 countsByYear W23309136542023 @default.
- W2330913654 crossrefType "journal-article" @default.
- W2330913654 hasAuthorship W2330913654A5010080080 @default.
- W2330913654 hasAuthorship W2330913654A5051385435 @default.
- W2330913654 hasAuthorship W2330913654A5055264351 @default.
- W2330913654 hasAuthorship W2330913654A5059945797 @default.
- W2330913654 hasAuthorship W2330913654A5086048471 @default.
- W2330913654 hasConcept C110872660 @default.
- W2330913654 hasConcept C130698151 @default.
- W2330913654 hasConcept C144027150 @default.
- W2330913654 hasConcept C15744967 @default.
- W2330913654 hasConcept C186594467 @default.
- W2330913654 hasConcept C18903297 @default.
- W2330913654 hasConcept C2777792020 @default.
- W2330913654 hasConcept C2778004101 @default.
- W2330913654 hasConcept C2778979269 @default.
- W2330913654 hasConcept C39432304 @default.
- W2330913654 hasConcept C542102704 @default.
- W2330913654 hasConcept C55493867 @default.
- W2330913654 hasConcept C59822182 @default.
- W2330913654 hasConcept C6557445 @default.
- W2330913654 hasConcept C86803240 @default.
- W2330913654 hasConceptScore W2330913654C110872660 @default.
- W2330913654 hasConceptScore W2330913654C130698151 @default.
- W2330913654 hasConceptScore W2330913654C144027150 @default.
- W2330913654 hasConceptScore W2330913654C15744967 @default.
- W2330913654 hasConceptScore W2330913654C186594467 @default.
- W2330913654 hasConceptScore W2330913654C18903297 @default.
- W2330913654 hasConceptScore W2330913654C2777792020 @default.
- W2330913654 hasConceptScore W2330913654C2778004101 @default.
- W2330913654 hasConceptScore W2330913654C2778979269 @default.
- W2330913654 hasConceptScore W2330913654C39432304 @default.
- W2330913654 hasConceptScore W2330913654C542102704 @default.
- W2330913654 hasConceptScore W2330913654C55493867 @default.
- W2330913654 hasConceptScore W2330913654C59822182 @default.
- W2330913654 hasConceptScore W2330913654C6557445 @default.
- W2330913654 hasConceptScore W2330913654C86803240 @default.
- W2330913654 hasIssue "11" @default.
- W2330913654 hasLocation W23309136541 @default.
- W2330913654 hasOpenAccess W2330913654 @default.
- W2330913654 hasPrimaryLocation W23309136541 @default.
- W2330913654 hasRelatedWork W1990532535 @default.
- W2330913654 hasRelatedWork W2030153807 @default.
- W2330913654 hasRelatedWork W2038230306 @default.
- W2330913654 hasRelatedWork W2040698941 @default.
- W2330913654 hasRelatedWork W2056713152 @default.
- W2330913654 hasRelatedWork W2104536183 @default.
- W2330913654 hasRelatedWork W2391087212 @default.
- W2330913654 hasRelatedWork W2396718715 @default.
- W2330913654 hasRelatedWork W4306766270 @default.
- W2330913654 hasRelatedWork W2523806502 @default.
- W2330913654 hasVolume "33" @default.
- W2330913654 isParatext "false" @default.
- W2330913654 isRetracted "false" @default.
- W2330913654 magId "2330913654" @default.
- W2330913654 workType "article" @default.